Raymond works for a pharmaceutical company that is testing the effectiveness of a new medication. He gave one of the study participants 400 milligrams of the medication, and he knows the amount remaining in the participant's body will decrease by \( \frac{1}{3} \) each hour. Write an exponential equation in the form \( y=a(b)^{x} \) that can model the amount of medication, \( y \), remaining in the participant's body after \( x \) hours. Use whole numbers, decimals, or simplified fractions for the values of a and \( b \). \( y=\square \)

(a) Which equation can help you estimate the sum of 5 (A) \( 6,000+2,000=8,000 \) (B) \( 60,000+2,000=62,000 \) (C) \( 60,000+20,000=80,000 \) (D) \( 100,000+20,000=120,000 \)

16. DIO DEEPER A teacher makes Hawaiian popcorn for the 26 students in her class by adding 1 batch of Hawaiian popcorn seasoning to 13 cups of popcorn. Each student gets 2 cups of popcorn. How many batches of seasoning does the teacher use?

A cone has a volume of 1356.48 cubic inches and a height of 16 inches. What is its radius? Use \( \pi \approx 3.14 \) and round your answer to the nearest hundredth. \( r \approx \square \) inches Submit

\( 16.50 cm \quad Hm \)

El producto de 11 números enteros positivos es 11 . ¿Cuál es la suma de estos números?